correct me if I'm wrong...I'm thinking you might be referring to last weeks sketch challenge? found here:
Forums at Splitcoaststampers
if so, no special tools except your trimmer and maybe a ruler! unless of course you're like me and "guesstimate" everything!!!
in the case of the cuttlebug at the angle...it most likely was embossed and then cut on an angle...at least for the card I did anyway!
Hope this helps...